It is because the heart pumps the blood, which helps the blood bring nutrients and oxygen to all parts of the body and carbon dioxide out of the body.
Oxygen is the gas humans and animals need to breathe in.
Oxygen and water.
ALL of it.....you want to have a healthy heart to BE alive or to STAY alive
They need to stay alive to support the organism
Your heart (cardiac).....Blinking....Breathing....Basically defense mechanisms and what you NEED to do to stay alive.
No. Animals have the pure need to stay alive.
You need: YOUR HEART, LUNGS, SMALL INTESTINE, LARGE INTESTINE, GULL BLADDER and SOME MORE!
All animals need three basic things to stay alive: food, water, and shelter. Humans included.
Only if they are hungry. of course if they want to stay alive. the body needs nutrients to be able to function.
eagles and humans are alike because we all need the same resources to stay alive and to provide for their young children and the rest of their family[s].
You can't live without a heart.
Oxygen is needed to stay alive. Without it you suffocate.